Circular scale
l parts of the world, mostly in association with the citrus industry. In more northern countries of its range, it occurs in greenhouses. In addition to [...] scales up to 2 mm in diameter with a slightly raised, sub-central point which is sometimes pale. When the scale is lifted, the insect beneath is yellow and up [...] General The circular scale, Chrysomphalus aonidum is a tropical species, native to the Oriental region but it has been dispersed widely in tropical and